The aim of study was to determine whether the volume of substrate in which miniature Cyclamen persicum cultivar from the Libretto F₁ group were cultivated, affected their growth and flowering. The research was carried out in two cycles: 6 May-4 November 2005 and 8 May-20 November 2006. Use was made of pots 9, 10, 11, 12 cm diameter and respective volumes of 270, 340, 500 and 721 cm³. The substrate employed was highmoor peat limed to pH of 6.0 and enriched with 3 g of a slow-release fertilizer Hydrocote 3-4 M (13-13-13) per 1 dm³. The cyclamen seedlings were planted in pots in the 19th week of 2005 and 2006. Two weeks from the planting they started to be fertilized weekly with solutions of Kristalon fertilizers. The diameter, number of leaves and fresh matter of aerial parts of plants grown in the smallest, 9-cm, pots were significantly smaller than in those growing in pots of 10-12 cm diameter. Flowering started earlier in cyclamens grown in 9- and 12-cm pots than in 10- and 11-cm pots, but the number of flowers in the latter group was greater.